From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40160) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxxfN-0007w0-5K for qemu-devel@nongnu.org; Fri, 20 Jun 2014 08:11:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WxxfH-0001x3-6W for qemu-devel@nongnu.org; Fri, 20 Jun 2014 08:11:37 -0400 Sender: Paolo Bonzini From: Paolo Bonzini Date: Fri, 20 Jun 2014 14:11:10 +0200 Message-Id: <1403266283-1517-2-git-send-email-pbonzini@redhat.com> In-Reply-To: <1403266283-1517-1-git-send-email-pbonzini@redhat.com> References: <1403266283-1517-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PULL 01/14] KVM: Fix GSI number space limit List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexander Graf , qemu-stable@nongnu.org From: Alexander Graf KVM tells us the number of GSIs it can handle inside the kernel. That value is basically KVM_MAX_IRQ_ROUTES. However when we try to set the GSI mapping table, it checks for r = -EINVAL; if (routing.nr >= KVM_MAX_IRQ_ROUTES) goto out; erroring out even when we're only using all of the GSIs. To make sure we never hit that limit, let's reduce the number of GSIs we get from KVM by one. Cc: qemu-stable@nongnu.org Signed-off-by: Alexander Graf Signed-off-by: Paolo Bonzini --- kvm-all.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kvm-all.c b/kvm-all.c index 4e19eff..56a251b 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -938,7 +938,7 @@ void kvm_init_irq_routing(KVMState *s) { int gsi_count, i; - gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING); + gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; if (gsi_count > 0) { unsigned int gsi_bits, i; -- 1.7.1